Triumph Speed 400: Fuel Meter & Chain Tensioner Issues – Bad Warranty Experience

I own a Triumph Speed 400 and I’m facing issues with the bike’s fuel/range meter and chain tensioner.
The fuel/range indication is not showing properly. I reported the issue at Triumph Vapi, but initially I was told that there was no problem with the bike. I also experienced rude behavior from the showroom team. After escalating the matter to the owner, they finally inspected the bike and accepted that there was an issue.
I have also been facing a chain tensioner issue since purchasing the bike.
Has anyone else faced similar issues with the Speed 400 or had a similar experience with Triumph service/warranty claims? What was your experience and how did Triumph resolve it?